我们需要这样做是为了禁止用户输入空值作为文件名。除非userInput不为null,否则应禁用保存按钮。
这是当前代码:
public void openDialog() {
@SuppressLint("InflateParams") View view = (LayoutInflater.from(AudioRecorder.this)).inflate(R.layout.audio_name_input, null);
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(AudioRecorder.this);
alertBuilder.setView(view);
final EditText userInput = view.findViewById(R.id.userInput);
alertBuilder.setCancelable(true);
alertBuilder.setPositiveButton("Save", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
inputName = String.valueOf(userInput.getText());
Toast.makeText(AudioRecorder.this, "Next audio clip will be named... " + inputName, Toast.LENGTH_SHORT).show();
filePathMaking();
}
});
alertBuilder.setNegativeButton("cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
Dialog dialog = alertBuilder.create();
dialog.show();
}
最佳答案
您可以执行以下操作:
if(input != null){
button.setEnabled(true); //you can click your button now
}else{
button.setEnabled(false); //you can not click your button
}
根据您的评论进行编辑:
这是通用自定义对话框的示例:
这将是您的对话框类(或类似的东西,仅是示例):
public class FullSizeImageDialog extends Dialog {
private ImageView imageView;
private ProgressBar fullImageProgreesBar;
private Context dialogContext;
public FullSizeImageDialog(@NonNull Context context) {
super(context);
setContentView(R.layout.full_size_image_dialog);
dialogContext = context;
imageView = findViewById(R.id.full_size_image);
fullImageProgreesBar = findViewById(R.id.fullImageProgreesBar);
}
}
这是对话框的布局(在我的情况下为
R.id.full_size_image
):<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#66F9B639">
<!--Place your views here-->
</android.support.constraint.ConstraintLayout>
当您想显示对话框时,它非常简单:
FullSizeImageDialog dialog = new FullSizeImageDialog ();
dialog.show();
现在,您可以将逻辑放入自定义对话框类中。